Spin Physics at JINR,
now and in future
R. Lednicky, JINR Dubna
 Introduction
 JINR in COMPASS
 Spin Physics at Nuclotron
 Spin Physics at NICA
 Technologies
October 6-11, 2008
SPIN 2008, Charlottesville
JINR plans
DIRECTIONS
Acc./Lab.
Experiment
SM & beyond:
hadron and lepton
collider physics
TEVATRON
BEPC-II
CERN LHC
ILC
CDF,D0
BES-III
ATLAS, CMS
?
Neutrino physics,
Astrophуsics
GRAN SASSO
Daya Bay
JPARC-KAMIOKA
Space
OPERA, Borexino
Daya Bay
T2K
NUCLEON, TUS
CERN SPS
KEK
JPARC
U-70
NA48/1-3 NA62
E391a
JPARC
KLOD
Nuclotron/NICA
LNS, pHe3, Δ
Rare processes:
CP-violation, K-decays
Spin Physics &
Nucleon Structure
Non-p. QCD
Relativistic Nuclear Physics:
Phase trans., 3N-forces
Particles in Nuclear Medium
H
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P
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2007
2008
2009
2010
2011
2012
2013
2014
2015
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S
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FAIR
PAX
?
Nuclotron
PS/SPS
FAIR
NIS
DIRAC
PANDA
?
Nuclotron/NICA
RHIC
SPS, LHC
SIS, FAIR
MPD
STAR
NA61, ALICE
Hades, CBM
?
JINR in Spin Physics
Source of Polarized Ions (CIPIOS based) for
Nuclotron-M / NICA complex
will provide  1010 d /pulse for Nuclotron-M
MPPT (movable p target) for f.t. experiments
Spin physics of few nucleon systems A.Kovalenko
pp elastic scattering (analyzing powers & correlation coefficients)
- meson production in pp near the threshold
-pd (3-nucleon forces, analyzing powers & correlation coefficients)
-pA (analyzing powers of various targets)
-
Nucleon Spin structure
 COMPASS (SPS CERN), HERMES (Desy)
A.Nagaitsev, I.Savin
O.Shevchenko
 SPD at NICA (pp, pd –polarized, S > 20 GeV) LoI in preparation
JINR in COMPASS
Responsibility for running HCAL1,MW1 and MWPC
Scientific program:
With µ beam
With hadron beam
Spin dependent SFs
Pion and Kaon polarizabilities
Polarized PDFs
Diffractive production of exotic
Gluon polarization
Search for glueball
Transversity
Light meson spectroscopy
Lambda polarization
Vector meson production Production of double-c baryons
Future: GPDs via DVCS- JINR constructing new ECal
based on AMPDs (invented in JINR)
Additional equipment to the COMPASS setup
DVCS μp  μ’p’
μ’

2.5m liquid H2 target
to be designed and built
L = 1.3 1032 cm-2 s-1
μ
Nμ=2.108/SPS cycle
(duration 5.2s, each 16.8s)
p’
ECal1 + ECal2
  10°
+ additional calorimeter
ECal0 at larger angle
(JINR DUBNA)
AMPD’s tested at CERN
Recoil detector
to insure exclusivity
to be designed and built
POLARIZATION PROGRAM AT NUCLOTRON
“S P I”
Polarized proton target
TENSOR
dpol
LNS, pHe3
Internal
target
STRELA
NO
LNS, pHe3
deuteron beam
intensity, 1/sec
VECTOR
deuterons
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10
“P O L A R I S”
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5
10
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6
10
neutrons & protons
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nucleon beam
intensity, 1/sec
ALPOM
Polarized nucleons
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
Delta 2
Polarized proton target
The goals of LNS+p3He :
- analyzing powers in the dp-elastic and dp-breakup reactions to study the
energy dependence of 3NF (LNS)
- polarization observables in the d3He→pα in a GeV range in the region of
the deuteron D-wave dominance (p3He)
- deuteron beam polarimetry at energies higher than 270 MeV
Internal target station
at Nuclotron
p3He: T20
RIKEN
LNS: Ayy dp 880 MeV
Future Nuclotron
STRELA
Measurements of the cross section and T20
in dp→pp(1S0)+n charge exchange reaction
coordinate resolution  100 m (drift chambers)
Analyzing powers for reaction p + CH2 for proton momenta up to ~7 GeV/c
Calibration of polarimeter for JLAB μpGEp/GMp experiment
ALPOM setup
JINR-TJNAF collaboration - College of William and Mary - Norfolk State Univ. –
DAPNIA Saclay, Rutger Univ. and P.J. Safarik Univ.-
Many studies in intermediate energy
physics require measurement of
polarization of the secondary
particles.
These investigations provide rich
information concerning nuclear
structure and reaction mechanism.
Thus the GEp collaboration at
Jefferson Lab is preparing to
continue measurements of ratio of
the electric and magnetic form
factors of the proton GE/GM, by the
recoil proton polarization method.
The 4th phase of this experiment
requires a new polarimeter to
measure the polarization of the recoil
proton of momentum up to ~7 GeV/c.
New experiments with 12 GeV beam at JLab
Ratio GEp/GMp from components of recoil
proton polarization, Pt and Pℓ measured
with large polarimeter with 2π azimuthal
acceptance:
Current data base of analyzing power: need
Ay at 1/p=0.12 GeV-1, or p=7.5 GeV/c
Approved expt. Jlab E12-07-109, GEp(V)
POLARIMETER
Δσ-experiment
Full determination of the np elastic scattering matrix element at zero degree
in the few GeV energy region. Needs SPI and MPPT.
Nuclotron’s region
The world NN data base
Very scarce neutron data
V.I.Sharov et al, Czech. Journ. of Phys. 52 (2002),
Suppl. C, C287; also at SPIN-2002 Conf.
Movable Polarized Proton Target
JINR-Saclay-ANL
Nucl. Instr. & Meth. A372 (1996) 349-351
200 mm length and 30 mm diameter - 9*1023 atoms/cm2
Refrigerator temperature  50 mK
Solenoid magnetic field 2.5 T
Proton (L,T) polarization 80/85% for positive/negative polarization
Spin Physics at NICA
- p, D beams with high
- polarizqtion (>50%)
- high luminosity (>1030 cm-2 s-1)
- spin rotation L/T
- polarimetry to ~3%
- nearly 4 detector SPD
- most attractive physics task:
MMT-DY processes with p↑,D↑
q G
Lq v q
Lg
Conceptual design for Spin Physics Detector
Preliminary scheme ot the SPD
experimental set-up
(SPD)
A.Nagaitsev, I.Savin,
O.Shevchenko, etc.
Requirements to the detector :
•
4 geometry to enlarge MMT-DY event statistics
•
•
minimal X0 – effective detection of lepton pairs
good angular resolution
– very important for azimuthal
spin asymmetries measurements
in the wide kinematical region
Set-up for muon pairs detection is also under consideration
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NEW SPIN PROGRAM AT JINR
Preliminary estimations of the Drell-Yan processes feasibility
DY cross sections (nb) in comparison with PAX (GSI,FAIR) &
possibility to increase the statistics (month of data taking)
PAX background estimations
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NEW SPIN PROGRAM AT JINR
The SSA for 100k DY events
sin(+S):
access to transversity and
Boer-Mulders PDFs
Sissakian, Shevchenko, Nagaytsev,
PRD 72 (2005), EPJ C46 (2006)
sin(-S):
access to Sivers PDFs
Efremov,… PLB 612(2005), PRD 73(2006)
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Some R&D for NICA
• RPC for TOF
• Segmented straw for the Outer Tracker
• Micro strip detectors with super low mass
cables for the Inner Tracker
R&D progress in RPC modules for TOF
10-gap RPC module prototype assembling
installation of
the fish-line
coiling on
the external
readout board
fish-line is
using as
a spacer
installation of the glass electrode
with the conductive paint
assembled prototype
with the fast preamp
developed by ALICE
on the base of
NINO chip
V.Golovatyuk’s
group
R&D progress in Segmented Straw
tracking detectors achieve low occupancy
& safer operation in harsh environments
V.Peshekhonov’s
group
segmented straw prototype
The prototype is developed for
the beam testing with:
 Double Layer Detector
(anode high-voltage)
 FEE (low-noise amplifiers)
 DAQ (interface PCI-Express &
64-channels TDC)
Double Layer Detector contains:
2x48 straws ( 4 mm; L = 40cm)
400 segments (L ~ 10cm/segment)
FEE density: FEE is 1 ch. / 1mm
R&D progress in IT
Consortium: GSI, JINR, INP MSU,
SESRTIIE (Kharkov),
IHEP, Saint-Petersburg Uni.,
Saint-Petersburg Radium Inst.,
ITEP
Double side silicon micro strip
sensor (15x15mm2, 50um strips, 285
um thickness, 256 channels)
mounted on a base plate with super
low mass cables for PS & readout
photo of the prototype produced
in SESRTIIE (Kharkov)
Yu.Murin,
V.Nikitin, et al.
JINR was strongly involved in detector production
for LHC experiments ATLAS, CMS, ALICE
Example: Transition Radiation Detector for ALICE
Transition Radiation Detector (TRD) is one of the major
components of ALICE setup. Detector consists of 540 wire
chambers with total sensitive area ~736 m² and the number
of electronics channels ~ 1, 2 million.
The main task of TRD is electron identification,
at the same time the TRD is also the tracking
detector at ALICE.
It is performed as a cylinder and consists of 18
SuperModules. Each SuperModule of 7 meters length
includes 6 layers with 5 chambers in the layer.
The mass production of the chambers by
- Bucharest (NIPNE)
- Dubna (JINR) 100 ch./540
- Frankfurt (University)
- Darmstadt (GSI)
- Heidelberg (University)
New Detector Lab at LHEP JINR
Wire’s plane transfer on the chamber frames.
Test stand setup with collimated X-ray beam
New Detector Lab with the Climate facility and Clean
rooms (~120 m²) was arranged at LHE JINR (as well as
at 4 other Institutes of Collaboration) for the Chambers
construction and test.
Coordinator of TRD ALICE at JINR Winding machine under PC control
Yu. Zanevsky
JINR accelerator activities at FAIR / NICA
- The full scale prototypes of SIS100 dipole and quadrupole magnets are
at present under construction at JINR based on Dubna technology of fast
ramping superconducting
magnets
Dipole 2.75 м
Quadrupole 1.1 м
- Development of the numerical model for cooling and heating of the beam
at the internal target and experimental study of these processes at COSY
Total structure of SIS100 includes:
Dipoles - 108
Quadrupoles – 168
Estimated cost is about 15ME, including finishing the R&D.
Development of Electron String Ion source KRION
for Nuclotron-M / NICA
(team of Е.D. Donets and Е.E.Donets)
Expected parameters of new Stand Electron String Ion
Source (ESIS) «Krion-6T» Based on Krion-3T
(magnetic field B 6.0 Т, electron energy Ee  25 keV)
versus R&D results.
Ion beam
R&D results:
Growth rate of
ion yield vs B;
Produced ions
pulse
frequency, f
Ion yield
per pulse
Ni
Au30+
Ne/i 
B
Ne/i 
B2
Au69+ (with use of ion-ion
cooling technology)
Ne/i 
B3
Ne/i 
B
Ne/i  Ne/i3
B
B2
30 Hz 60 Hz 120 Hz
0.1 Hz
1109
1.5108 3108 6108
210
9
4109
0.2
Hz
It is planned to perform first test run with new Krion-6T source at the
end of 2009 – beginning of 2010.
0.4 Hz
Welcome to the
collaboration!
Thank you for attention!
R. Lednicky
April 2, 2008
A.N.Sissakian, A.S.Sorin
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